/Engine/Source/Developer/AssetTools/Public/IAssetTools.h
Try and diff two assets using class-specific tool. Will do nothing if either asset is NULL, or they are not the same class.
void DiffAssets ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * OldAsset, [UObject](API\Runtime\CoreUObject\UObject\UObject) * NewAsset, const struct [FRevisionInfo](API\Editor\AssetDefinition\FRevisionInfo) & OldRevision, const struct [FRevisionInfo](API\Editor\AssetDefinition\FRevisionInfo) & NewRevision ) const